mac: update CQI in MAC with CSI reports from PHY

Signed-off-by: Carlo Galiotto <carlo@srs.io>

lib/include/srsran/common/rwlock_guard.h

@@ -31,19 +31,19 @@ private:
   pthread_rwlock_t* rwlock;
 };
 
-// Shared lock guard that automatically unlocks rwlock on exit
+// Shared lock guard that automatically unlocks rwmutex on exit
 class rwlock_read_guard
 {
 public:
-  rwlock_read_guard(pthread_rwlock_t& rwlock_) : rwlock(&rwlock_) { pthread_rwlock_rdlock(rwlock); }
+  rwlock_read_guard(pthread_rwlock_t& rwlock_) : rwmutex(&rwlock_) { pthread_rwlock_rdlock(rwmutex); }
   rwlock_read_guard(const rwlock_read_guard&) = delete;
   rwlock_read_guard(rwlock_read_guard&&)      = delete;
   rwlock_read_guard& operator=(const rwlock_read_guard&) = delete;
   rwlock_read_guard& operator=(rwlock_read_guard&&) = delete;
-  ~rwlock_read_guard() { pthread_rwlock_unlock(rwlock); }
+  ~rwlock_read_guard() { pthread_rwlock_unlock(rwmutex); }
 
 private:
-  pthread_rwlock_t* rwlock;
+  pthread_rwlock_t* rwmutex;
 };
 
 } // namespace srsran

srsenb/hdr/stack/mac/mac.h

@@ -112,7 +112,7 @@ private:
 
   srslog::basic_logger& logger;
 
-  // We use a rwlock in MAC to allow multiple workers to access MAC simultaneously. No conflicts will happen since
+  // We use a rwmutex in MAC to allow multiple workers to access MAC simultaneously. No conflicts will happen since
   // access for different TTIs
   pthread_rwlock_t rwlock = {};
 

srsenb/hdr/stack/mac/nr/ue_nr.h

@@ -59,7 +59,7 @@ public:
   void       metrics_phr(float phr);
   void       metrics_dl_ri(uint32_t dl_cqi);
   void       metrics_dl_pmi(uint32_t dl_cqi);
-  void       metrics_dl_cqi(uint32_t dl_cqi);
+  void       metrics_dl_cqi(const srsran_uci_cfg_nr_t& cfg_, uint32_t dl_cqi, bool valid_cqi);
   void       metrics_dl_mcs(uint32_t mcs);
   void       metrics_ul_mcs(uint32_t mcs);
   void       metrics_cnt();
@@ -85,6 +85,7 @@ private:
 
   uint32_t         phr_counter          = 0;
   uint32_t         dl_cqi_counter       = 0;
+  uint32_t         dl_cqi_valid_counter = 0;
   uint32_t         dl_ri_counter        = 0;
   uint32_t         dl_pmi_counter       = 0;
   mac_ue_metrics_t ue_metrics           = {};

srsenb/src/stack/mac/mac.cc

@@ -996,7 +996,7 @@ void mac::write_mcch(const srsran::sib2_mbms_t* sib2_,
   rrc_h->add_user(SRSRAN_MRNTI, {});
 }
 
-// Internal helper function, caller must hold UE DB rwlock
+// Internal helper function, caller must hold UE DB rwmutex
 bool mac::check_ue_active(uint16_t rnti)
 {
   if (not ue_db.contains(rnti)) {

srsenb/src/stack/mac/nr/mac_nr.cc

@@ -365,6 +365,11 @@ bool mac_nr::handle_uci_data(const uint16_t rnti, const srsran_uci_cfg_nr_t& cfg
   if (value.valid and value.sr > 0) {
     sched.ul_sr_info(cfg_.pucch.rnti);
   }
+
+  // Process CQI
+  srsran::rwlock_read_guard rw_lock(rwlock);
+  ue_db[rnti]->metrics_dl_cqi(cfg_, value.csi->wideband_cri_ri_pmi_cqi.cqi, value.valid);
+
   return true;
 }
 
@@ -401,7 +406,6 @@ int mac_nr::pusch_info(const srsran_slot_cfg_t& slot_cfg, mac_interface_phy_nr::
   srsran::rwlock_read_guard rw_lock(rwlock);
   if (ue_db.contains(rnti)) {
     ue_db[rnti]->metrics_rx(pusch_info.pusch_data.tb[0].crc, nof_bytes);
-    ue_db[rnti]->metrics_dl_cqi(15); // TODO extract correct CQI measurments
   }
   return SRSRAN_SUCCESS;
 }

srsenb/src/stack/mac/nr/ue_nr.cc

@@ -194,11 +194,26 @@ void ue_nr::metrics_read(mac_ue_metrics_t* metrics_)
   ue_metrics     = {};
 }
 
-void ue_nr::metrics_dl_cqi(uint32_t dl_cqi)
+void ue_nr::metrics_dl_cqi(const srsran_uci_cfg_nr_t& cfg_, uint32_t dl_cqi, bool valid_cqi)
 {
-  std::lock_guard<std::mutex> lock(metrics_mutex);
-  ue_metrics.dl_cqi = SRSRAN_VEC_CMA((float)dl_cqi, ue_metrics.dl_cqi, dl_cqi_counter);
+  // I think this is not necessary, as we locked from the calling function
+  // std::lock_guard<std::mutex> lock(metrics_mutex);
+
+  // Process CQI
+  for (uint32_t i = 0; i < cfg_.nof_csi; i++) {
+    // Increment CQI opportunity
     dl_cqi_counter++;
+
+    // Skip if invalid or not supported CSI report
+    if (not valid_cqi or cfg_.csi[i].cfg.quantity != SRSRAN_CSI_REPORT_QUANTITY_CRI_RI_PMI_CQI or
+        cfg_.csi[i].cfg.freq_cfg != SRSRAN_CSI_REPORT_FREQ_WIDEBAND) {
+      continue;
+    }
+
+    // Add statistics
+    ue_metrics.dl_cqi = SRSRAN_VEC_SAFE_CMA(dl_cqi, ue_metrics.dl_cqi, dl_cqi_counter);
+    dl_cqi_valid_counter++;
+  }
 }
 
 void ue_nr::metrics_rx(bool crc, uint32_t tbs)